Carbureter.



F. S. HOWE.

CARBURETER.

APPLICATION FILED use. 24 m 2.

Patented Jan. 26, 1915.

FSHovvE swan, W

Elnora;

ITEP TATEfi? MAnsnAI-iirowm mwn cinnonntmn nthem; 26'. 191.5;

'g l i cnitioiz iikd HQ, 19 13; y g i ',St'nte of Iowa, have invented certain nemand useful Improvements mv Carbn reters, 'ofjwhich the iclipwinglis a specified tinny referencebeing had to the accompany mg drawings.

' ients in cazhu eters, and more pai f aim the primary object oi the invention'isto pgzgvide an iniproved carburetor which will an rednc'o ex eh'sc'in" the operation lcsor othei nsesf w v 3; further object ofthe invention. resides -"dings 'cai hnz et'cf "vher;in a tertiary ni balancing yai zc provided and arranged ins it .plsneim adyancc offqr above the but: y vzilveo'f the cf hui'eter, thcrhy pro vidi-ng a hy -ginss for the-entrance of fresh. U25 A 1 1 a; to t e carb ne; when the blittei'fly vo is injfived fitomn widely open to a olesed;posatzon.1

1A still further 'of the inventionjrfesides 'insproviding a supe heating means in conncc on with" the carburetor; and still mother; hjeot oi the invention residesi in providing a device ivh ioh is simple middl nam in, construction, nexpensive to mann fzicture, .and one which ivfvill be very efficient andzusefui. in operation," V y r 'With these and otherobjects in 'viow; the inventionconsis'tsin the novel features "of construction, ccmhinationlsnd arrangemeht of parts! asiwili be, heieinaften referred to and mote"particularly pointed out in the specification 'andclainis. 1

intheaocompanying dl awingoforming a p rt of this spniioation, Figure 1 is a vertic all'ongitu'dinsi section through & earhu ret'er oonstrubted'in accordance with mv .int ontiong" Fig. 2 is :i horizontal section t erethir'ough asseen on line 2-2, Fig. 1. Fig; 8 isa detail lan View of the operating mechanism for tne inlet valve at thecarbureting ehgmber; parts being disclosed i i-section. 1}igA-is hdetaii side elevation thereof. .1

, i 'In describing my invention, Ishall refer tie the drawin Bins invention whites te'new 'andnsefzii -o s carhnceter adapted to u-se"ke :o-j other, similar 0113 'as fine! therein,

internai 'oo nhdsti oii engine for auto ticn A and B; respective secured: together in any s'iiitahle' manner. One-po'rtionof this casing o ho singis designed to fO IfII1 a float 'chainliier 2, in whioh'ismonnted a central shaft 3, and niounted'in the chamber isa float-4, that surrounds the shaft: 3 and carries an Upwardly extenollingearfito which is pimtefd the inner eii of "an arm 6 fulolumed intermediate of its ends to a hanger '7 depending from the top'of the chamber 2, the outer end of this arm 6 coiiperat-ing with a valve memhcrto he presently described.

The bottom ofthe chamhgn 2 is pi oiii'ded wit-ha fuel inlet port 8,1 fwith'whi'ch communicz tes an inlet, I fuel pipe 9 extending fijm an}? sow-17 9f pp o showni, and this 33011 8 tzininiitesl in 11 yslv'jseat 1O. A needie valve-11 is adapted to be seated in the of itsends at 12. ["A- nut1 13or the. like is carried by the outer end of thearm 6 and engages with the threaded portion 12' of. the needle vqrhze. En'circl ing the upper portion valve seat 1G,iand isthreaded intermediate 4 of the needle valve 11 to rest rpnthe nut 13, I} is swoon, sum 1/; andfapsleeve nut-15 is thereof, the upper portionyof said needle valve, being loosely. -r'ccei ed siccve nut 15% .ifronifth'e; el'script on of the consti; tion of this portionof the-device, it wiii he soon that-the, amount of fuel to be received in the float chamber Q'may'be adjusted, as desired by'theadjustmentof the sleeve nut 15. A

The-lower section BM-10f the device has an extension 16 formed thereon which is designedmmewhat tgbulsriand extends latterzilly, the-outertermjination thereof form- .ing an auxiliary 'air inletl'f; The upper seetionii. of the casing is also provided with a tubular cxtension constituting a, superhezited miXing'chambepIS which is designed to fitover the inner termination of the tubular portion of the extension 16 and theupper termination 19 offtheohamber 18, is adapted to connect-directlytto the intake manifold of-the engine. Leading from the bottom of theflathamhezwQ and extending through the casing forming-the extension 16, is a duct hichtei'min'ates in a chamber 21 formed inthe lowenporti'on of the member 18 and Win.' 'if(} convenience, :be termed a ca rhurcting chamber.

,thxonghc said 24, is a coil spring 26, the tendency of which is to force the needle valvedownwardly so as to engage wholly or partially with the seat 22, as the case may be. Arranged be-:

tween the arms 24, is a rod 27, on which is mounted a collar or the like 28 against which bears a cam 29, An ear 30 projects upwardly from the upper of the arms 24 and has fulcrumed thereon an L-shaped or bell crank lever 31, the free end of one arm of which is adapted to cooperate with the cam 29, and the free end of the other arm thereof to cooperate with a nut 32 which is adjustably carried on the threaded upper end of the needle valve 23. A throttle lever 33 has connection with the arm 27 and from this construction it will'be seen that the needle valve 32 will be raised or lowered as said latter lever is actuated. The cam 29 is 021-- a thumb screw 34 threaded into an arm 38 projecting from the collar 28 as clearly shown in Fig. 3.

Pivotallv arranged at the lower portion of the chamber 18. is a butterfly valve 35 to which is connected an arm 36' extending on the outside of the chamber. Comm-"ted to this arm 36 i a link 37 which also has connection with the arm 38 formed on the collar 28. This butterflv valve, it will be seen, operates vgith the actuation of the throttle lever and s multaneously with the operation of the needle valve 23.

- Leading from the carburetingchamber 21, is a channel 39 which is of predetermined size and preferablv' tapered toward its outer end at which point it communicates with the interior of the chamber .18. just below the butterfly valve 35. Arranged in the chamber 18, is a superheating coil 40,which leads from" the exhaust manifold (not shown) of the engine. The pipe forming this'coil may be of any desired material and one terminal extends through 'an opening 41 in the upper portion of the chamber 18 andthe other ter-. minal of the coil leads directly to the carbureting chamber 21 for a purpose to be hereinafter and more particularly set forth.

A lateral extension or the like 41 is provided on the upper portion of the chamber 18 and constitutes an air chamber and has an inwardly opening valve 42 urranged in connection therewith. This val-e is normallyhcld in-its closed position by means of a spring'43 which cooperates with one face of the valve 42 and an enlarged upper end of an adjustable stem 44, the-latter being threaded into engagement with a thread ed opening in the liawer wall of the extension 41, the valve constituting an air governing valve. This valve, which forms the tertiary or balancing valve of the carbureter is disposed in a plane above the plane of the butterfly valve and in the disposition of said latter valve, from a widely open to a closed position, a fresh supply of air is admitted to the carbureter and an overloading of a rich mixture to the device, as is true in most carbureters, underthese conditions, is obviated. In view of these conditions, carbonizing ofthe cylinders and the fouling of the spark plugs is prevented and cool air is admitted to the device, thus preventing'the undue heating of the motor.

This device, as indicated above, is adapted for use'in connection with kerosene or like oils and in the operation of the devicethe fuel enters the float chamber 2, through the inlet port 8, from the source of supply. The

fuel will flow into the chamber 2 to raise the float 4 and on reaching a predetermined level will cause the float to rise to such an extent as to'dispose the needle valve 11 to its closed position in the seat 10. The fuel will then flow through the duct 20 to the carbureting chamber 21. The fuel empty ing into the chamber 21 is mixed with the hot air which is also emptied into said chamber from the superheating coil 40,. it being understood that the latter connects with the exhaust of the engine, and'the mixture of the fuel and hot air is" passed out through the channel-way 39 into the hollow or tubular portion of the extension 16. At thistime the mixture combines with the air which is drawn therein through the auxiliary air inlet 17 and is atomized, it being understood that the butterfly valve 35 is disposed to its open or partially open position, and this atomized mixture then passes to the superheating mixing chamber. As this mixture rises in the last mentioned chamber, the same again mixes with the additional air drawn in the device through the opening of the balancing or tertiary valve 42 and this mixture is then complete and ready to be,

fresh supply 'of air is introduced into the device through the opening of the valve 42 and, in this manner, the overloading of a rich mixture into the dcvice. under such conditions; is prevented. This is true in view ,of the particular position of the. valve 42 with respect to the butterfly valve 35 and the other advantages of such positioning of the valv as with respect to one another are also true, as previously stated.- It will also be noted that the valveelQ acts as an air cushion to the motor and gives greater llexibility of the control thereof and in view of the many advantages set forthjor this valve the same may be considered a governor valve. The needle valve 23 will, obviously, be actuated simultaneously with the actuation of the throttle lever, in view of the particular construction of the parts in connection therewith, as previously described.

.From the foregoing, it will be seen that I have provided a simple, inexpensive and ellicient means for carryin out the objects of the invention and .vhile l have particularly described the elements best adapted to perform the functions set fortln'it is obvious that various changes in form, proportion and in the minor details of construction may be resorted to avithout departing from the spirit or sacrificing any of the principles of the invention;

Having thus described this invention, what I claim is l. A carburetor of the class described comprising a fioat'cl amber, a carbureting chainber, an air inlet, a superheating mixing chamber in communication with the air inlet and carbureting chamber, a throttle valve arranged at the lower end of said super-heating mixing chamber communicating with the air inlet and carbureting chamber, a throttle valve arranged at the lower end of said superhcatmg mixing chamber,

means actuated by the ad ustment of the throttle valve to control the feed of the fuel In a car'oureter of the class described, a

"banibcr or '11:-

float. chambeia i 1: t municating t'lrreuith, an a in et, a. throttle valve, a needle valve to contro the flow fuel from the float chamber to the arbureting chamber, means for simultaneously actu ating said throttle and needle valvesmnti an additional air inlet'iirrangctl in a above said throttle valve l. In a carburetcr offhc class described, a float chamber, a c ing chan'iber havlug communici 'it'h, an air inlet, means to supply sdperlu .ted air to the cat bureting chamber. a ,rheating mixing chamber having :on'in'ninication with the carbureting chamber and air inlet, a throttle valve arrang d at the loiver end of said superheating Bulging cliai-nber, means actnated by the adjustment of the-throttle valve to control the feed of the fuel to the car-bureting chamber, and an. additional air inlet arranged above said superheating mixing chamber.

5. A carburetor of the class described comprising a float chamber, a carbureting-cham- I l l ber communicating thcrewitlnan-air inlet, a

super-heating mixing chamber communicatingwith the air inlet, said carburetmg chamher being provided with .a irestrictedoutletchannel tapering in width; greater toward its outer end and terminating at a point adjacent the lower end of the superheating mixing chamber, a throttle'valve arranged at the lower end of said super-heating mix ing chamber, just above the termination of the aforesaid restricted outlet channel, and an additional air inlet arranged. in a plane above said super-heating: mixing chamber.

In testimony whereof I hereunto afiir; my signature in the presence of two witnesses. FREDERICK S, l-lOiVE. lVi-tnesses ll. H. Jones,

R. C. Pirrisusozv.

plane- 

